11521806 has 16 divisors (see below), whose sum is σ = 23096448. Its totient is φ = 3831800.

The previous prime is 11521799. The next prime is 11521813. The reversal of 11521806 is 60812511.

It is an interprime number because it is at equal distance from previous prime (11521799) and next prime (11521813).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (1443528).

Almost surely, 2^11521806 is an apocalyptic number.

11521806 is an abundant number, since it is smaller than the sum of its proper divisors (11574642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11521806 is a wasteful number, since it uses less digits than its factorization.

11521806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11521806 is about 3394.3785881955. The cubic root of 11521806 is about 225.8604484750.

The spelling of 11521806 in words is "eleven million, five hundred twenty-one thousand, eight hundred six".